WO1983003407A1 - Procede de regeneration d'alkalis - Google Patents

Procede de regeneration d'alkalis Download PDF

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Publication number
WO1983003407A1
WO1983003407A1 PCT/AU1983/000035 AU8300035W WO8303407A1 WO 1983003407 A1 WO1983003407 A1 WO 1983003407A1 AU 8300035 W AU8300035 W AU 8300035W WO 8303407 A1 WO8303407 A1 WO 8303407A1
Authority
WO
WIPO (PCT)
Prior art keywords
alkaline
transition metal
alkaline earth
metal oxide
oxide
Prior art date
Application number
PCT/AU1983/000035
Other languages
English (en)
Inventor
Paper Manufacturers Limited Australian
Original Assignee
Nguyen, Kien, Loi
Keogh, Andrew, Joseph
Covey, Geoffrey, Harold
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nguyen, Kien, Loi, Keogh, Andrew, Joseph, Covey, Geoffrey, Harold filed Critical Nguyen, Kien, Loi
Priority to BR8306659A priority Critical patent/BR8306659A/pt
Publication of WO1983003407A1 publication Critical patent/WO1983003407A1/fr
Priority to FI834274A priority patent/FI73255C/fi
Priority to NO834277A priority patent/NO162429C/no

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
    • C01D1/04—Hydroxides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye

Definitions

  • This invention relates to an improved method of preparing alkali metal hydroxides from alkali metal carbon ates or from the spent liquor generated by the alkaline pu ing and/or bleaching of cellulosic materials.
  • the method is particularly relevant to the regeneration of sodium hyd roxide from the spent liquor generated by the pulping and/ bleaching of cellulosic materials with sodium hydroxide, with or without various pulping aids, and especially when the system is substantially sulphur-free.
  • Patent discloses a method of recovering an alkaline or alka line earth metal oxide or hydroxide from a solution contain ing organic chemicals and other impurities which comprises burning said solution with an oxide of a suitable transitio metal selected from the group consisting of Ti, Fe, Co, Ni, and Mn, to form a product containing a mixed oxide compound of said alkaline or alkaline earth metal and said transitio metal, subsequently washing said mixed oxide in cold water and then submerging the washed solid in water of a higher temperature than said washing step to form a solution of an oxide or hydroxide of an alkaline or alkaline earth metal and a precipitate of said transition metal oxide and sub ⁇ sequently separating said precipitate for recycling to sai first addition steps and recovering a solution of said alka line or alkaline earth metal oxide or hydroxide.
  • This method enables large particles of transition metal oxide to be used, thus permitting the use of high gas velocities in the fiuidized bed.
  • the small particles so produced will hereafter be referred to generally as "fine material” irrespective of where in the system they are generated or of their chemical form (be it transition metal oxide, double-oxide of transition metal an alkaline metal). It is comparatively difficult to separat that fine material which is present after the submergence in water from the regenerated alkali metal hydroxide solut- ion or from the water (if any) used to wash the transition metal oxide.
  • the present invention provides a method of recovering an alkaline or alkaline earth metal oxide or hydroxide from a solution containing an alkaline o alkaline earth metal carbonate, organic chemicals and impur
  • OMPI_ ities which comprises burning said solution in a fiuidized bed of particles of an oxide of a transition metal selecte from Ti, Fe, Co, Ni, and Mn, and maintaining said fiuidize bed at or above a temperature at which said alkaline or alkaline earth metal carbonate becomes molten, subsequentl recovering a mixed oxide compound of said alkaline or alkal ine earth metal and said transition metal from said fiuidiz ed bed, submerging said mixed oxide in hot water to form an alkaline or alkaline earth metal oxide or hydroxide and a precipitate of said transition metal oxide and, subsequentl separating said precipitate for recycling to said fiuidized bed and recovering a solution of said alkaline or alkaline earth metal oxide or hydroxide wherein the fine material in the recycled transition metal oxide precipitate is subjecte to contact with spent liquor from a delignification process Fine material collected from other points in the system whether transition metal oxide, double oxide of transition metal and alkaline metal or a mixture of both, is treated
  • This improvement is partly based on the finding that some of the fine material in the fiuidized bed agglome ates to form useful sized particles. These agglomerates are of moderate strength but, on passing through the system are degraded in size at a substantially higher fate than those particles which are not agglomerates. Therefore, if this method is to be used to permit the reutilization of fine material in the process, it is necessary to enhance th rate of agglomeration.
  • the rat of agglomeration of fine particles is increased significant ly, and in some cases this is the only action which is required to permit re-use of fines.
  • the agglomerates are of Inferior strength to naturally occurring material of similar size an in some embodiments of the process the equipment used may result in attrition to the extent that agglomeration is not an adequate means of re-incorporating the fines into the pr cess.
  • the alkali regeneration can be carried out as part of a Bayer Bauxite process to regenerate sodium hydroxide o more preferably may be used to regenerate alkaline pulping liquors in substantially sulphur free delignification pro ⁇ Deads or from bleaching liquors used in such processes.
  • the pellets so produced were dried in an oven at 105°C and then heated at 950°C for 45 minutes.
  • the pellet were then screened and the mean compression strength of 2-4 mm particles determined with results as shown in Table 1.
  • Natural hematite was crushed, screened and the fraction passing through a 2 mm screen but retained on a 0.25 mm screen introduced at a feed rate of 130 kg/h to a fiuidized bed in which spent soda-quinone pulping liquor was being burned by the method described in Australian Patent
  • a fiuidized bed was operated by the method descri ed in Australian Patent 519 156. Spent soda pulping liquo was introduced to the fiuidized region through a water-cool tube so that the liquor emerged as a continuous stream and there was minimal dispersion of the liquor prior to its con tact with the fiuidized region. Under these conditions fines were entrained from the fiuidized bed at an average rate of 58 kg/h.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Iron (AREA)
  • Paper (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Processing Of Solid Wastes (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Stepping Motors (AREA)
  • Optical Communication System (AREA)
  • Lubricants (AREA)

Abstract

Amélioration d'un procédé de régénération d'oxydes ou d'hydroxydes alkalins ou de métaux alkalino-terreux à partir d'une solution notamment dans des procédés de délignification où un métal de transition approprié tel qu'un oxyde ferrique est brûlé avec la solution pour produire un oxyde mélangé qui est ensuite traité dans de l'eau chaude pour régénérer l'oxyde ou l'hydroxyde alkalin ou de métal alkalino-terreux et pour précipiter l'oxyde métallique de transition. L'amélioration consiste à régler la quantité de fines présentes dans l'oxyde métallique de transition de manière à les maintenir à un niveau acceptable dans la zone de combustion à lit fluidifié. On obtient cela en mettant en contact les fines avec la liqueur utilisée dans un procédé de délignification. L'invention permet d'exécuter également la réduction en comprimés du matériau de fines d'oxyde métallique de transition et la liqueur provenant du procédé de délignification peut être utilisée en tant que liant dans la formation desdits comprimés.
PCT/AU1983/000035 1982-03-25 1983-03-24 Procede de regeneration d'alkalis WO1983003407A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR8306659A BR8306659A (pt) 1982-03-25 1983-03-24 Processo aperfeicoado de regeneracao de alcali
FI834274A FI73255C (fi) 1982-03-25 1983-11-22 Regenereringsfoerfarande foer alkali.
NO834277A NO162429C (no) 1982-03-25 1983-11-22 Fremgangsmaate for gjenvinning av alkali- eller jordalkalimetalloksyd eller -hydroksyd fra en opploesning.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPF331182 1982-03-25
AUPF3311820325 1982-03-25

Publications (1)

Publication Number Publication Date
WO1983003407A1 true WO1983003407A1 (fr) 1983-10-13

Family

ID=3769428

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1983/000035 WO1983003407A1 (fr) 1982-03-25 1983-03-24 Procede de regeneration d'alkalis

Country Status (9)

Country Link
US (1) US4486394A (fr)
EP (1) EP0090568B1 (fr)
JP (1) JPS59500511A (fr)
AT (1) ATE14712T1 (fr)
AU (1) AU552973B2 (fr)
CA (1) CA1188485A (fr)
DE (1) DE3360504D1 (fr)
FI (1) FI73255C (fr)
WO (1) WO1983003407A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223438A1 (fr) * 1985-10-29 1987-05-27 Research Association of Pulp and Paper Technology Procédé de récupération d'hydroxyde de sodium à partir d'une liqueur alcaline usée dérivant de la préparation de pâte

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA849901B (en) * 1983-12-23 1985-08-28 North Broken Hill Ltd Method of improving the purity of alkali-metal hydroxides
FI914587A (fi) * 1991-09-27 1993-03-28 Ahlstroem Oy Foerfarande foer framstaellning av natriumhydroxid
US5302248A (en) * 1992-08-28 1994-04-12 The United States Of America As Represented By The Secretary Of Agriculture Delignification of wood pulp by vanadium-substituted polyoxometalates
US5549789A (en) * 1992-08-28 1996-08-27 The United States Of America As Represented By The Secretary Of Agriculture Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp
ZA937253B (en) * 1992-09-30 1994-04-19 North Broken Hill Ltd A process for recovering alkali metal hydroxide from organic liquors
EP2086299A1 (fr) * 1999-06-02 2009-08-05 Ibiden Co., Ltd. Carte de circuit imprimé multicouches et procédé de fabrication d'une carte de circuit imprimé multicouches
KR101653909B1 (ko) * 2015-02-25 2016-09-02 이관종 유압 밀림방지 실린더

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1407276A (en) * 1972-11-10 1975-09-24 Oji Paper Co Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry
US4169131A (en) * 1977-10-05 1979-09-25 Nittetu Chemical Engineering Limited Process for recovering caustic alkali from spent alkali liquor
JPS54135700A (en) * 1978-04-13 1979-10-22 Ishikawajima Harima Heavy Ind Co Ltd Recovering method for caustic soda from pulp waste fluid
JPS5560020A (en) * 1978-10-27 1980-05-06 Toyo Pulp Kk Alkaline waste liquor treating method
AU519156B2 (en) * 1978-04-20 1981-11-12 Australian Paper Manufacturers Limited Alkali regeneration process
US4322266A (en) * 1978-11-01 1982-03-30 Combustion Engineering, Inc. Process for catalyzing reduction in a Kraft recovery boiler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796791A (en) * 1971-12-20 1974-03-12 Nichols Eng & Res Corp Process for reclaiming limestone mud
US3878288A (en) * 1972-02-15 1975-04-15 James A Commins Reclaiming of lime plant fines
JPS5112724B2 (fr) * 1974-02-23 1976-04-22
CA1115490A (fr) * 1978-04-20 1982-01-05 Geoffrey H. Covey Methode de regeneration des alcalis
JPS59162128A (ja) * 1983-02-28 1984-09-13 Kawasaki Heavy Ind Ltd パルプ廃液から苛性ソ−ダを回収する方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1407276A (en) * 1972-11-10 1975-09-24 Oji Paper Co Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry
US4169131A (en) * 1977-10-05 1979-09-25 Nittetu Chemical Engineering Limited Process for recovering caustic alkali from spent alkali liquor
JPS54135700A (en) * 1978-04-13 1979-10-22 Ishikawajima Harima Heavy Ind Co Ltd Recovering method for caustic soda from pulp waste fluid
AU519156B2 (en) * 1978-04-20 1981-11-12 Australian Paper Manufacturers Limited Alkali regeneration process
JPS5560020A (en) * 1978-10-27 1980-05-06 Toyo Pulp Kk Alkaline waste liquor treating method
US4322266A (en) * 1978-11-01 1982-03-30 Combustion Engineering, Inc. Process for catalyzing reduction in a Kraft recovery boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223438A1 (fr) * 1985-10-29 1987-05-27 Research Association of Pulp and Paper Technology Procédé de récupération d'hydroxyde de sodium à partir d'une liqueur alcaline usée dérivant de la préparation de pâte

Also Published As

Publication number Publication date
JPS59500511A (ja) 1984-03-29
FI834274A0 (fi) 1983-11-22
AU1335883A (en) 1983-10-24
EP0090568A1 (fr) 1983-10-05
AU552973B2 (en) 1986-06-26
CA1188485A (fr) 1985-06-11
ATE14712T1 (de) 1985-08-15
FI834274A (fi) 1983-11-22
US4486394A (en) 1984-12-04
JPH0368151B2 (fr) 1991-10-25
FI73255B (fi) 1987-05-29
FI73255C (fi) 1987-09-10
EP0090568B1 (fr) 1985-08-07
DE3360504D1 (en) 1985-09-12

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